[antlr-interest] assigning preference to one of two intersecting rules
cgorski at cgorski.org
cgorski at cgorski.org
Fri Aug 17 10:17:31 PDT 2007
In the grammar that follows, I am attempting to match all
strings such as:
"54"
"a54"
"#75"
"n.ob89"
I'd like to be able to extract the Prefix and Number
values for later use in a parser. What's the best way to
go about this? How do I tell
ANTLR to attempt to match first the first rule in
BoxNumberComplete?
BoxNumberComplete : BoxNumberPrefix BoxNumber
| BoxNumber
;
fragment
BoxNumberPrefix : 'number'
| 'n''.'*'o''.'*
| '#'
;
fragment
BoxNumber : (Alpha|Digit)+;
fragment
Alpha : 'a'..'z';
fragment
Digit : '0'..'9';
Thanks,
Chris
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